Information and Network Security

What is information Security ?

• About securing information from unauthorized access.

• vulnerability protection that comes in the form of a physical device rather than software

• refers to the range of tools, controls, and measures designed to establish and preserve database confidentiality

• refers to specified steps or measures used to protect the OS from threats, viruses, worms, malware or remote hacker intrusions.

DOS stand for _____

• denial of service

• daniel of service

• do on schedule

• dont open the slot

What is mean by one party cannot deny receiving a message or a transaction nor can the other party deny sending a message or a transaction?

• Non-repudiation
• Confidentiality
• Integrity
• Availability

What is the formula for Decryption in Caesar Cipher?

• p=(c-k) mod 26
• c=p+k
• c=(p+k) mod 26
• p=c-k

In a(n) …...........cipher, the same key is used by both sender and receiver.

• A Symmetric-Key
• An Asymmetric-key
• Both symmetric and asymmetric
• none of the mentioned

…........... means information is not disclosed to unauthorized individuals, entities and process. 

• Confidentiality
• Non -Repudiation
• Availabilty
• Integrity

An Attack which involves modification of Data is known as _____.

• active attack
• passive attack
• security attack
• threat attack

A ------ takes place when one entity pretends to be a different entity It includes one of the other forms of active attack.

• Masquerade
• Replay
• Release of message
• Availabilty

…....... are symmetric algorithms.

• Playfair
• Ceasar
• Vernam
• All

Vernam is …................. Cipher.

• Stream
• Block
• Both of the mentioned
• none of the mentioned